Okay, was playing my world today (latest update) and somthing freaky happened. I came down from my base at 4am to kill the zombies attacking my base and in the middle of fighting they all just died. They died but in very slow motion like the matrix, irradiated and all. This was day 2 single player. It was the weirdest thing I ever saw in this game lol. Like they were falling on the moon.
Sorry to say the scavenging bug is still present. The no loot between levels one.